Multi-tuner receiver for concurrent reception of mutually different signals
AssigneeU.S. Philips Corporation
InventorJohannes H. A. Brekelmans
Life of this patent
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Abstract
In a receiver, two tuners (TUN1,TUN2) provide concurrent reception of mutually different signals. The two tuners are merged into one module (MOD). This may give rise to mutual interference. However, there are various cost-efficient measures to counter such mutual interference. One such measure is that an oscillation frequency in either of the two tuners does not coincide with the radio frequency, or any sub-harmonic of the radio frequency, of the signal received by the respective other tuner.
Claims16
A receiver comprising at least two tuners for concurrent reception of mutually different signals, and with the at least two tuners merged into one module, wherein said two tuners each have an oscillator coupled to a respective mixer for converting a signal at a radio frequency to an intermediate frequency, and the oscillator of each of the two tuners has an oscillation frequency (Fosc1 or Fosc2) which does not coincide with the radio frequency (RF2 or RF1), or any sub-harmonic of the radio frequency, of the signal received by the respective other tuner.
A receiver comprising first and second tuners for concurrent reception of mutually different signals, each of the first and second tuners having an oscillator coupled to a respective mixer for converting a signal at a radio frequency to an intermediate frequency, and wherein the oscillator of each of the first and second tuners has an oscillation frequency (Fosc1 or Fosc2) which does not coincide with the radio frequency (RF2 or RF1), or any sub-harmonic of the radio frequency, of the signal received by the respective other tuner.
A method of concurrently receiving mutually different signals by means of at least two tuners, each of the at least two tuners having an oscillator coupled to a mixer for converting a signal at a radio frequency to an intermediate frequency, said method comprising the step of operating the oscillator of each of the at least two tuners at an oscillation frequency (Fosc1 or Fosc2) which does not coincide with the radio frequency (RF2 or RF1), or any sub-harmonic of the radio frequency, of the signal received by another of the at least two tuners.
Dependencies are inferred from the claim text.